That is common in quite a few languages. A comma to separate the whole and fractional part and optionally a dot to group the digits in thousands. In fact, as far as I know, only English has it the other way around.

At least they did not use the word "billion". That is just plain awfull

__________________In particle accelerators atoms are indeed not only touching each others. But banging together in a massive explosive orgasm.
-- nieldk in a TMO post